Punch press



Sept. 22, 1925. 1,554,711

' S. F. DIETRICH PUNCR PRESS Filed Aug. 7. 1922 HHHHI SebastianRDiEtrichSept. 22, 1925. I I l.554,7l7

s. r. DIETRICH PUNCH rust 56 n1 Ju 7. 192 s Sheets-Sheet 2 F 4 f 625 a;I

w z w M 7/ 70 I w w. 85 l 4 I 65 I 5/ ,47F t /750 n- 'L'Z" 52 i 1jebastianf. DiEtmBh Sept. 22, 1925.- 1,554,111

S. F. DIETRICH PUNCH PRESS Filed Aug. 7. 922 5- Sheets-Sheet 5 52 63 /wPatented Sept. 22, 1925.

UNITED STATES PATENT owl-cs.

SEBASTIAN F. DIE'IRICH, OF CUDAI-IY, WISCONSIN, ASSIGNOR TONON-BREAKABLE BUTTON CORPORATION, OF MILWAUKEE, WISCONSIN, A CORPORATIONOF WIS- consm.

PUNCH rnnss.

Application fi1ed August 7, 1922.: Serial No. 580,201.

To all whom itmay concern: p

Be it known that I, SEBASTIAN F. DIETRICH,

a citizen of the United States, and resident of Cudahy, in the county ofMilwaukee and 5 State of lVisconsin, have invented certain new anduseful Improvements in Punch Presses; and I do hereby declare that thefollowing is a full, clear, and exact description thereof. 7

The invention relates to punch presses for punching rubber wads from ablank of stock and depositing them on a mould to be formed into buttonss It comprises a die-plate having openings therein and punches foracting uponistock and pressing it through the openings, form ing it intowads and depositingthewads on tins which are carried by amould.

The object of the invention is to substantially simultaneouslyp'unchwads of plastic rubber from a blank and deposit them on a mould,whence they may be formed into buttons. This operation is designed toeffectuate economy of time, labor and material.

Whereas heretofore the practice of depositing the wads on to the mouldby hand has.

been attended with considerable delay and inconvenience, the operationnecessitating several distinct movements of the hand for the fixing of asingle wad in position, the invention accomplishes the cutting out of alarge number of wads and their a'ffixation to the mould in a momentstime, with a minimum of labor and with substantially no wastage ofmaterial. Only one man is required to operate. the machine. The stockmay be inserted conveniently and quickly, after which the depression ofa pedal by a foot causes the downward movement of the 4 possible tomould a number of buttons from a blank of stock without necessitating.

formation of the individual wads and their manual positioning in themould, yet this operation has been expensive and wasteful, inasmuch asit resulted in wasting of the material between the buttons which becamevulcanized simultaneously with the buttons,

so that its plastic character was destroyed and its value greatlylowered, inasmuch as punches, the complete process of forming Again,whereas heretofore it has been.

after having been vu lcanized it could not then be worked up with thestock and formedinto buttons. N

With the above and other objects in View, which will appear as thedescription proceeds, my invention resides in the novel construction,combination and arrangement of illustrated one complete example of thephysical embodimentof the present invention constructed according to thebest mode I have so far devised for the practical applicatlon of theprinciples thereof,and in which: 1

t Figure .1 is a rear elevation of the device showing the upper part ofthe legs broken away. t

Figure 2 is a sideelevation of the machine. Figures 3, 4, 5, and 6 areside elevations of the die punches and associated parts, bringing outthe several steps in the process.

Figure 7 is a detail, showing the. punch and'its manner of cooperationwith the dieplate. 5

Figure 8 is a' planof a Wad or'disc resultlng from the punchingoperation. Forelegs 10 are provided formed of angle iron.v They arestrengthened by braces 11 running from front to rear. A'brace 12 isprovided across the front and a brace 13 in the rear. From the latter asupport'l l extends rearwardly, as does also a support 15 secured to arear leg. On these supports bearings16 are located, rotatably supportinga shaft 17 providing a pivot'for a lever 18which is rigid with a fork 19for con trolling the clutch 20 onshaft 21 operated by the motor 22. p

Spring 23 is secured at one end to brace 12 and at the other to lever18, andoperates to maintain the lever normally in position, renderingthe clutch inoperative. The clutch controls the rotation of shaft 24journalled in bearings 25 and carried on a'plate 26 extending from frontto rear and secured to braces 12 and 13. Worm 27 rigid with shaft 24; isoperative to rotate worm gear 28 on shaft 29 journalled in bearings 30supported by braces 11. Shaft 29 extends laterally beyond the bearingsand operates through gears 31- 31" to actuate gears 3232 on shaft 33journalled in a bottom plate 34 for he P es a Th -b tom p at is se u d.t egs .0 by bolts 35. It is provided with a plurality of verticalcylindrical openings in which guide posts 36 are positioned, the guideposts being enlarged intermediately to form shoulders 37 resting onmould guides 38secured to the bottom plate 34. Thgui'deposts are fixedin position by nuts 39 threaded on their lower ends. Each of the'guideposts 36-is bored longitudinally to receive a trip rod 40 which isa'd'justably secured to a rectangular frame 41 by means of nuts 42.

To the side members of the frame a pair of links 43 arepivotally securedby bolts 44, the upper ends of'the links being pivoted to arms 45rigidwith a shaft "46 rotatable in a bearing 47 The shaft carries an arm48 having aroller 49 at its end adapted to contact with shaft 33'and acam 50 rigid with the shaft 33. y I Bottom plate 34-l asa centralopening to' permit reception of the cam and arm '48.

The'cam-terminates in rounded shoulders 51' disposed substantially onehundred and eighty'degrees aparts "fAheavy top plate 52, somewhatsimilar to bottom plate 34, is pro vided having a plurality of verticalopenings slidably receiving bushings 53" havingclosed upper ends 54against which springs 55, received in recesses inthe ends. of guideposts 36, are adapted to contact. Trip. rods 40 are providedwith nuts 56at their upper ends adaptedtocontact withthe ends .of the bushings." Ashaft 57: extends. transversely of thetop, plate. journalled:inbearings. 58

on the sides.

A pair of links,59;extend from shaft 57 to shaft 33,. Eccentrics60 areprovided in the upper lends .of "links59 andv envelop shaft 57. By.means ofnuts- 61 integraltherewith, the eccentricsmay. be. adjusted tovary the distance between shafts 33 and 57. The eccentrics are slotted,as shown, at 62 and are preventedfrom outward movement on shaft 57 by.cotters 63. The ends of shaft 33 are,v

therein, and adjacent the upper part'of the. openings, is countersunk sothat. punches.

6 6 may be rivetedin. place. Disposed beneath the punch plate is. astripper plate 67; maintainedin fixed relationto die-plate 68;,by means;of lateral spacers 69. The

stripper, spacers and. die-plate are secured.

rigidly together andthe stripper and die.-

plate are providedwith a number of alined holes adapted to receive thepunches 66. They are provided also with openings receiving bushings 53,the openings in the spacers 69 being enlarged to receive a collar 7 0rigid withthe bushing.

In one phase of operation of the machine a, mould 71 is positioned uponthe bottom plate, its reaward limit of movement being determined byprojections 72 on guides 38. The guides operate to center the mould 71so that pairs of pins 73-thereon may be disposed immediately beneath thepunches 66. A mould having pairs of pins is provided when buttons havingpairs ofopenings are to be made. here a button with four openings is tobe made, pins are disposed; in groups of four. The number of pins maybevaried.

In operating the device, after the mould is put in place, which -maybedone when the parts are substantially in the positions shown in Figures2 and 3," a rectangular blank of stock 7 4 is insertedbetween-stripperplate 67 and die-plate-68. Lever 18 is then depressed, which operates,through the intermediate gearing to rotate shaft 33. As

the center of eccentric 64 is at this time above the centerof shaft 33,the movement causes links 59-to move downwardly, the eccentric travelingin a counter-clockwise direction lookingat Figure3. This bringsthepunches 66 in contact withthe stock, as shown in Figure 4. Thedescent of the punches thus operates to punch out: a number of wads 7 5in the holes in die-plate 68, and press these wads on to pins 73.

Figure 5 illustrates the relation ofparts when the punches havecompleted the action offorming the wads from the stock. At this timeroller 49 on arm 48is positionedon the eccentric 5.0. The contact of theshoulder 51 with the roller operates througharm 48, shaft 46, arm 45 andframe 41, to elevate trip rods 40 so that nuts 56 are spaced abovebushings 53.

When the punches 66 descend and perform the punching operation, thepressure produced thereby on the stripper plate 67 and die-plate 68 issuch as to cause bushings 53 also to move downwardly. Consequently. whentrip rods 40 move upwardly, as described, springs 55, which have beencompressed by the downward movement ofthe bushing, exert a lifting forceand restore the stripper plate 67' to contact with punch plate 65, as.shown in Figure 6. Nuts 56 are at this time spaced. slightly above theupper-ends of the bushings. I

At this point of the operation the eccentric 64 is downwardlydisposedwith respect to the center of'shaft- 33. Furthermotationof the shaftoperatesto lift links 59 andtop plate 52, spacing punch plate 65' fromstripperv plate 67. The stripper plate is. prevented from followingpunch plate 65- to its uppermost position by contact of the remove hisfoot from the leverl8, causing the machine to come to rest. The mouldmay then be removed carrying therewith the wads of rubber supported onpins 73. The perforated blank of stock may also be removed and a newblank inserted, a new mould being substituted for the old.

One complete cycle of operation is thus accomplished. The blanks ofstock are in a plastic condition and the wads positioned on the pins maybe compressed between two parts of a mould, the pins serving to form theholes in the buttons. As is known to those skilled in the art, thebuttons are vulcanized in the mould. After the positioning of the blankof stock on the dieplate, the mere depression of lever 18 is operative.to position the wads on the mould. Thus a large number of wads may beput in place in but a moment of time.

This operation contrasts markedly with the methods heretofore employed,the positioning of the wads by hand being extremely slow, as severalmotions of the hand are necessary in the a'ffixation of a single button,nor does the novel method result in a waste of the perforated blank ofstock for the reason that this stock is not deposited upon the mould,but is removed in its unvulcanized state. Thus the stock may be reusedin forming other buttons.

I claim 1. The combination of a plurality of punches adapted to operateupon stock, a mould, a plurality of pins on said anou'ld, and meanscooperating with said stock and said punches for forming wads from saidstock, said punches being movable to deposit the wads on said pins.

2. The combination of an upper plate having an opening therein, a lowerplate having an opening therein alined with said first mentionedopening, said plates being adapted to receive stock therebetween, amould, pins on said mould projecting into said second opening, aplunger, and means for moving said plunger through said openings forforming a wad from said stock and depositing said wad on the pins.

3. The combination of a die-plate having an opening therein and adaptedto receive a sheet of stock, a plunger for urging a wad from said stockthrough said opening, means for causing relative motion between saidplunger and die plate, a mould for receiving said wad, and means forseparating said mould from said die-plate.

i. The combination of a stripper plate having openings therein, adie-plate having openings therein, said stripper plate and said dieplate being adaptedtoreceive stock therebetween, a mould provided withpins, a plurality of punches, means for moving said punches through saidopenings to force wads. of stock, on to said pins, and means for movingsaid die-plate upwardly to .re-

lease said pins and permit the withdrawal;

of said mould.

5. The combination of a stripper plate having openings therein, adie-plate having openings therein alined with the openings in saidstripper plate, a mould, pins on said mould, a support for said mould, aplurality of plungers, means for moving said plungers through saidalined openings to force wads on to said pins, and guiding means forcentering said mould and said pins beneath said die-plate, whereby thepins will be positioned under the openings in said die-plate.

6. The combination of a bottom plate, a. guide post secured thereto, atop plate, a bushing for said guide post in said top plate, said guidepost having a longitudinal channel therein, and a trip rod slidable insaid channel.

7. The combination of a bottom plate, a post secured thereto, a topplate having an opening therein, a bushing for said guide post slidablein said opening, resilient means tending to move said bushing upwardlywith I respect to said guide post, said guide post having a longitudinalopening therein, and a guide trip rod slidable in said opening.

8. The combination of a bottom plate having an opening therein, a guidepost secured in said opening, said guide post having a longitudinalchannel therethrough, a top plate having an opening therein, a bushingfor said guide post slidable in said opening, resilient means tending tomove said bushing upwardly with respect to said guide post, a die platetrip rod slidable in said channel, and means for limiting the upwardmovement of said bushing with respect to said rod.

9. The combination of a bottom guide plate having a plurality ofopenings there in, a plurality of guide rods received in said openingshaving longitudinal channels therethrough, a trip rod slidable in saidchannels, a top plate having a plurality of openings therein, aplurality of bushings each slidably received in the openings in said topplate, the upper ends of said bushings being closed, a plurality of triprods each received in said channel, a spring interposed between the topofeach of said bushings and each of said guide posts, a

nut on the upper end of each of said guide 1 posts contacting with thetop of each of said bushings, a rotary shaft, a cam on said shaft, meanscooperating with said cam for moving said die rods downwardly, aneccentric on said shaft, and means cooperating with said eccentric andsaid top plate forlifting and lowering said top plate.

10. The combination of a bottom plate, a shaft rotatable thereon, asecond. shaft, a cam on saidfirst mentioned shaft, an eccentric on saidfirst mentioned shaft, means on said second shaft adapted to cooperatewith said first mentioned shaft and said cam for imparting rotarymovement to said second mentioned shaft, said second mentioned shaftbeing mounted; to rotate on said bottom plate, a plurality of trip rods,and means cooperating with said second shaft to raise and lowersaid triprods on the rotationof' said second shaft.

In testimony that I claim the foregoing I have hereunto set my hand at-Milwaukee, in the county of Milwaukee and ,State'of' lViscons-imSEBASTIAN F. DIETRIOH.

